Hello Kudu Jenkins,
I'd like you to reexamine a change. Please visit
http://gerrit.cloudera.org:8080/4995
to look at the new patch set (#17).
Change subject: KUDU-237 (part 2) - Add support for REINSERT in delta files
......................................................................
KUDU-237 (part 2) - Add support for REINSERT in delta files
This patch goes the final mile in adding support for REINSERTs in
delta files. It does various things to achieve this:
- Transforms REDO DELETE/REINSERT mutation pairs into UNDO
REINSERT/DELETE mutation pairs, leaving at the most a REDO
delete.
- Merges ghost rows on compaction: When duplicated rows are
found a new algorithm finds out which one is the most recent
and adds the other one as a 'previous_ghost'. This can happen
for an arbitrary number of ghost rows. Noteworthy is that setting
previous versions requires a copy. The two rows are in different
RowBlocks (for row data) and Arenas (for mutations) and it is
not guaranteed that the previous ghost will suvive by the time the
row that points to it is processed.
- Adds new test to tablet-test and changes a test in
compaction-test proving that this works.
- Adds a new test to compaction-test that creates several layers
of overlapping rowsets where each layer has one rowset less than
the previous one. This creates a mix of duplicated (up to 10
different ghosts) and unique rows. The test then compacts the
rowsets a few at a time and makes sure the histories are correct.
Follow up patches will add new itests that test this functionality
even more broadly.
Ran 500 loops of mt-tablet-test and compaction-test
in dist-test with "KUDU_ALLOW_SLOW_TESTS=1" and
"--stress_cpu_threads=4". All tests passed. Results:
compaction-test:
http://dist-test.cloudera.org//job?job_id=david.alves.1480028902.31041
mt-tablet-test:
http://dist-test.cloudera.org//job?job_id=david.alves.1480028908.31125
Change-Id: Ie1173b2bea721b376f2b6049be20f57307582c47
---
M src/kudu/common/row_changelist.h
M src/kudu/tablet/compaction-test.cc
M src/kudu/tablet/compaction.cc
M src/kudu/tablet/compaction.h
M src/kudu/tablet/delta_store.cc
M src/kudu/tablet/deltafile.cc
M src/kudu/tablet/deltafile.h
M src/kudu/tablet/tablet-test.cc
8 files changed, 663 insertions(+), 160 deletions(-)
git pull ssh://gerrit.cloudera.org:29418/kudu refs/changes/95/4995/17
--
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Gerrit-MessageType: newpatchset
Gerrit-Change-Id: Ie1173b2bea721b376f2b6049be20f57307582c47
Gerrit-PatchSet: 17
Gerrit-Project: kudu
Gerrit-Branch: master
Gerrit-Owner: David Ribeiro Alves <dral...@apache.org>
Gerrit-Reviewer: Alexey Serbin <aser...@cloudera.com>
Gerrit-Reviewer: David Ribeiro Alves <dral...@apache.org>
Gerrit-Reviewer: Kudu Jenkins
Gerrit-Reviewer: Mike Percy <mpe...@apache.org>
Gerrit-Reviewer: Tidy Bot
Gerrit-Reviewer: Todd Lipcon <t...@apache.org>
